Stewart Cellars was founded in 2000 by Michael Stewart, who built a career in technology in Texas before buying property in Napa Valley. Stewart runs the estate with his wife and adult children, and the consulting winemaker is Paul Hobbs, a much-admired winemaker who founded his own winery and consults throughout the world. Grapes are sourced from some of the area’s premium vineyards, including Las Piedras, Stagecoach and Ross Station, in the Russian River Valley. Stewart makes Cabernet Sauvignon, Pinot Noir and Chardonnay. Robert M. Parker Jr. has called Stewart Cellars a “small, high quality boutique producer” making “Pinot Noir and Chardonnay from the Russian River area as well as some exceptionally fine Cabernet Sauvignon from various vineyards in Napa.” He has rated the wines in the low to mid-90s.